Thermometer



E. S. PAYMENT yTmammieTER Filed' may 19. 1919 Patented Nov. 13, 1923.

"PATENT OFFICE. A

EDWARD S. PAYMENT,

or CHICAGO, ILLINOIS.

THERMOMETER.

. Application filed May 19,

To all whom it may concern.'

Beit known that I, EDWARD S. PAYMENT,

' Chicago, in the countyof Cool( and a citizen of the United Statesl residin `:tit ta e of Illinois, have invented a vcertain new and useful improvement in- Thermometers, of which the .following is a full, clear, concise, and exact description. v f

My invention relates to thermometers employed for measuring the temperature of liquids and has for its object the provision of a housing' for such a thermometer which permits of access of the liquid thereto yet which guards against the breakage thereof. The device of my invention includes a tube enclosing' the thermometer and open for the passage thereinto and therefrom of liquid whose temperature is to be 'measured; A l

l will explain my invention more fully by reference to the accompanying drawing in which Fig. 1 is a front View, partially in section, of a thermometer made in accordance with *the preferred embodiment of the T invention; Fig. 2 is a sectional view on line` 2 2 of Figa 1.; Fig. 3 lis a bottom view ofl the lower end of the structure; and Fig. 4l .is a side view of the lower lend of the structure. like parts are indicated by similar characters of reference throughout the ldilferent figures.

The operating agency of' the thermometer shown is a bimetallic thermostatic element l, 2 mounted at its lower end upon a support 3, although the invention Yis not to ,bev limited toa 'thermometer employing a thermostat. 'The upper end of.said .support carries a vIl() metallic scale 4 in the form of a segment whose curved edges are concentric with the pivot 5 of the metallic temperatureindicating needle 6 whose index end swings over the face of the scale.l The needle 6 is continued below its pivot 5 -to have pivotal connection with the arm 7 connected with the extended upper end of one of the thermostatic metallic parts 1 which is upwardly extended for the purpose. As the temperature rises the thermostat l, 2 becomes warped to an extent corresponding to the Atemperature, the needle 6 'being turned a A corresponding extent through the lever 7 When the temperature falls the thermostatstraightens to an extent .corresponding to the reduction intemperature. spring 8 presses upon the thermostatic part 2 to move the index endv of the needle 6 toward the v of the pointer.

1919. Serial No. 297,999.

zero end of the scale 4, as the temperature falls, the movement of the index being limited anddefined by the. thermostatf Two metallic contacts 9 and 10 are elec- G0 trically connected with 'and are adjustable along the metallic scale 4. These three elements/t, 9 and 10 are electrically connected with one terminal of an alarm bell or other indicator 11 whose other end 4is connected 65 with the metallic indicating needle. A battery 12 is connected in circuit with the in` dicatorl 11.

When the temperature reaches a predeterminedc lower limit, adjustably determined -by the left hand contact 9, the indicating needle o will engage said contact and cause the signal device 11 to soundby completing circuit therethrough. Similarly, rwhen the temperature 'reaches a predetermined `upper 75 limit, adjustably determined by therrlghtl hand contact 10 the indicating needle 6 will engage said contact and cause` the siqfgnal device 11 to sound.

The contacts 9 and 10 slide along the 8@ scale e' so that after the alarm vhas been sounded or otherwise manifested and the temperature should either continue to rise or fall, the -enpgapgeot contact will slide soas not to interfere Ywith the normal operation 8 The portion of the support 3 that is in the region of both of the thermostatic elements 1 and 2 is tubular and encloses the same. The lower end of the tubular por- Q0 tion of the support 3 is partially collapsed as' indicated at 13 to expand laterally of the tube beyond the balance thereof.` The'` thermostatic parts 1 and 2KL are spread kapart at their bottom ends to receive a block 14: 95 therebetween. Bolts 15 are passed through y the collapsed part of the tube, the, block and the thermostaticfelements to receive these parts in assembly.

By partially -collapsmg the tube at 13 100 the thermostat to enable it to operate the temperature indicating' needle 6. When the.

thermometer is lifted out, the hot liquid will readily flow out of theopenings in the tube, being finally emptied through the bottom passages 16. y

Having thus described my invention l claim as new and desire to secure by Letters Patent, the following:

A thermometer including a temperature indicating pointer; a temperature scale over which the pointer travels; a thermostatie element in actuating relation 'to said pointer; a tubular housing for and spaced apart from'the thermostatic element, this hous- 15 ing being partially collapsed at' yits lower end and extending at its collapsed portion of the housing, the upper portion of the housing being perforated to communicate with the space between the thermostatie element and housing.

In Witness whereof, I hereunto subscribe 25' my name this 14th day of May, A. D., 1919.

'EDWARD S. PAYMENT. 

